f(x) =
a) f(6) = 3.6-20 = 18 - 20 = -2
b) f(-1) = (-1)^{2}-2·(-1) = 1+2 =3
c) f(10) = -10^{2}+4·10-2 = -100 + 40 - 2 = -62
d) f(9) = -9^{2} + 4·9-2 =-81+36-2=-109
e) f(5) = 3·5-20 = 15-20 = -5
f) f(0) = 0^{2}-2·0 = 0 - 0 = 0
g) f(4) = 4^{2}-2·4 = 16 - 8 = 8
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f(x) =
a) f(6) = 3.6-20 = 18 - 20 = -2
b) f(-1) = (-1)^{2}-2·(-1) = 1+2 =3
c) f(10) = -10^{2}+4·10-2 = -100 + 40 - 2 = -62
d) f(9) = -9^{2} + 4·9-2 =-81+36-2=-109
e) f(5) = 3·5-20 = 15-20 = -5
f) f(0) = 0^{2}-2·0 = 0 - 0 = 0
g) f(4) = 4^{2}-2·4 = 16 - 8 = 8